Optical Properties
Luster
Resinous
Vitreous, Silky
Pleochroism
None
X = blue
Dispersion
Not Available
Not Available
Transparency
Not Available
Not Available
Refractive Index
1.653-1.688
1.680-1.698
Optic Character
Not Available
Not Available
Crystal System
Trigonal
monoclinic
Birefringence
Not Available
0.005-0.008
Clarity
Not Available
Not Available
